A Maryland company has issued a recall for 180,000 smoke alarms that may not work properly.

The Consumer Product Safety Commission says Universal Security Instruments issued the recall involving battery powered smoke alarms that may have a misaligned internal switch causing them not to activate properly. The company has received 134 reports of failure to activate during installation properly.

Universal Security is recalling its ten-year battery-operated ionization smoke and fire alarms with model numbers MI3050S and MI3050SB and with date codes between 2015JAN19 through 2016JUL11.

The alarms are white and 5½ inches in diameter. “Universal” and “Smoke & Fire Alarm” are printed on the front cover of the alarm. The label on the back of the alarm lists the model number and date code.

The units were sold online through specialty wholesalers and others from July 2015 to December 2016 about $20

People who own the alarms should immediately inspect them to find out it will activate properly by pressing the test button. If the alarm sounds, no further action is required. Additional instructions are located on the firm’s website.

If the smoke alarm does not sound during the test, consumers should immediately contact Universal Security for a replacement.

Contact Universal Security Instruments at 877-612-6955 from 9 a.m. to 4 p.m. ET Monday through Friday or online at www.UniversalSecurity.com and click on “Product Safety Notice” for more information.